HAVE_INIJMP will be set by architectures that support initjmp(), a non-standard extension to setjmp()/longjmp() allowing to initialize a jump buffer with a function pointer and a stack pointer. This will be useful to later introduce threads. With this new function it becomes possible to longjmp() to a particular function pointer (rather than to a point previously reached during program execution as is the case with setjmp()), and with a custom stack. Both things are needed to spin off a new thread. Then the usual setjmp()/ longjmp() pair is enough to save and restore a context, i.e., switch thread.
Signed-off-by: Jerome Forissier <[email protected]> --- arch/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/Kconfig b/arch/Kconfig index 35b19f9bfdc..8d5b54031b3 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -13,6 +13,12 @@ config HAVE_SETJMP help The architecture supports setjmp() and longjmp(). +config HAVE_INITJMP + bool + help + The architecture supports initjmp(), a non-standard companion to + setjmp() and longjmp(). + config SUPPORT_BIG_ENDIAN bool -- 2.43.0
